Rotatable-fan member.



F. A. HEATH.

ROTATABLE FAN MEMBER.

APPLICATION FILED JUNE 29, 1910.

Patented Apr. 13,1915.

TOLITHQ. WASHINGTON. D C.

. is operated FORREST A. HEATH, OF JERSEY CITY,

NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN- MENTS, T0 NEWJERSEY GARIBUEJETERCUMPANY, 0F JERSEY CITY, NEW JERSEY,

A. CORPORATION OF NEW JERSEY.

ROTATABLE-FAN MEMBER.

Specification of Letters Patent.

Application fiIedJune 29, 1910. Serial No. 569,523.

To all 10 mm it may concern Be it known that I, Fonnns'r A. HIEATIZI, acitizen of the United States, and a resident of the city of Jersey City,county of Hudson, and State of New Jersey, (whose post-office address isNo. 1 Exchange Place,

in said city of Jersey City,) have invented certain new and usefulImprovements in Rotatable-Fan Members, of which the following is aspecification.

The invention in a broad aspect relates to the structural feature of arotary fan which by the flow of a fluid therethrough or which isoperated from an eX- ternal source of power to cause a flow of fluidthrough the fan and more particularly it relates to a fan for use indevices for thoroughly mixing or commingling the gaseous mixture from acarbureter previous to its entrance into the cylinder of a hydrocarbonengine. It is a desideratum to make such a fan simple and light and atthe same time combine strength and rigidity. It is to this end that theinvention is directed.

As showing a specific embodiment thereof reference is made to theaccompanying drawings which form a part of the specification and inwhich- Figure 1 shows a plan view of the fan with a portion of the fanblades broken away showing braces or arms of the strengthening memberwhich are upon the side opposite that of the fan blades. Flg. 2 is aplan view of the fan blade member. Fig. 3 is a plan view of thestrengthening member while Fig. 4 is a transverse sectional view of thefan.

The axle or central member upon which the fan A rotates is designated byreference character a and to this there is .securedby soldering orotherwise the fan blade member 6. This member iscomposedof a ring 0, arim d and fan blades 6 extending between and integral with both the ringand rim and it is the ring 0 which is secured to the axle. There is alsosecured to the axle a by soldering, but it may be held in place in otherWays, the strengthening member which is designated by f in Fig. 3. Thismember is composed of a ring 9, rim h and arms or braces 2' extendingbetween and integral with both the ring 9 and rim it. In Fig. 4 it willbe seen that the rim it of the strengthening member is within the rim dof the fan blade member, and as there is a comparatively close fitbetween the rims it will be apparent that the rim of the strengtheningmember acts as a support for the rim (Z and therefore for the fan blades6 of the fan blade member 6. There is also a space between the arms orbraces sufiicient to permit the flow of the gaseous mixture which mustpass through the fan.

The material from which the fan blade member and the strengtheningmember are made is generally a flat sheet metal which is converted intoshape by bending and severing. It will be apparent that unless the fanblades are secured to a rim which is otherwise supported or braced thematerial from which the fan is made must be comparatively thick in orderto secure rigidity of the parts. Therefore the strengthening memberhaving the braces or arms engages the rim of the fan blades in suchmanner that the braces or arms will resist any tendency to distort thefan blade rims or even the fan blades and in order to particularly aidin accomplishing this feature the rim members are made so as to fittightly one inside of the other thereby forming a rigid structure whichwill be comparatively light, a feature quite advantageous specially whenthe fan blades must cause the rotation of the fan by a gaseous fluidmedium passing therethrough.

it is evident the rims may be secured by soldering or otherwise or therim of the fan may be within the rim of the strengthening member and ineither of these cases the arms may be tension members, therefore saidarms will be referred to as stress members as they may be members undertensile or compressive stresses. While I have shown the structureespecially applicable to a mixing device, it is obvious that it isequally applicable to any device having a fan.

Various forms and modifications may be made without departing from thespirit and scope of my invention.

I claim as my invention:

1. A rotary fan having a central memher, a rim, fan blades connected tosaid member and rim and stress members engaging the central member andconnected to a rim, the rim to which the fan blades are concomprisingacentral member, a cylindrical rim, fan blades extending between thecentral member and a cylindrical rim member, and stress members engagingthe central member and integral with a, cylindrical rim member which isbent angularly relative to the stress members.

3. Ina mixing device, a rotatable mixing member comprising a cylindricalrim within which there is located radially extending fan blades that areintegral with one edge portion of the cylindrical rim, the rotatablemixing member also comprising stress members extending between oppositeportions'of the other edge of the cylindrical rim, and a shaft to whichthe stress members and the inner portions of the fan blades areconnected.

This specification signed and witnessed this 23rd day of June, A. D.,1910.

FORREST A. HEATH. Signed in the presence of EDWIN A. PACKARD, G.MCGRANN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of- Patents,

- Washington, I): C.

